Reviewing nftables Changes as a Packet-Set Diff
A new tool compares nftables changes as packet-set diffs, enhancing firewall rule reviews.
Firewall reviews often suffer from discrepancies between text-based rule sets and their actual packet permissions. A minor edit can reactivate previously shadowed rules, leading to unintended traffic matches. To address this, a new tool has been developed that compares two rulesets at the packet level, indicating which rules have changed status. The tool focuses on basic chain filter tables and excludes user-defined chains, ensuring accurate analysis without external dependencies.
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